unreliable β not reliable; not to be relied or depended on.
bum β Someone's bum is the part of their body which they sit on.
catchy β If you describe a tune, name, or advertisement as catchy, you mean that it is attractive and easy to remember.
fake β to lay (a rope) in a coil or series of long loops so as to allow to run freely without fouling or kinking (often followed by down).
fishy β like a fish in shape, smell, taste, or the like.
imposturous β the action or practice of imposing fraudulently upon others.
mock β to attack or treat with ridicule, contempt, or derision.
oblique β neither perpendicular nor parallel to a given line or surface; slanting; sloping.
off β so as to be no longer supported or attached: This button is about to come off.
phony β not real or genuine; fake; counterfeit: a phony diamond.
plausible β having an appearance of truth or reason; seemingly worthy of approval or acceptance; credible; believable: a plausible excuse; a plausible plot.
scheming β given to making plans, especially sly and underhand ones; crafty.
seeming β apparent; appearing, whether truly or falsely, to be as specified: a seeming advantage.
serpentine β of, characteristic of, or resembling a serpent, as in form or movement.
slippery β tending or liable to cause slipping or sliding, as ice, oil, a wet surface, etc.: a slippery road.
snide β derogatory in a nasty, insinuating manner: snide remarks about his boss.
specious β apparently good or right though lacking real merit; superficially pleasing or plausible: specious arguments.
spurious β not genuine, authentic, or true; not from the claimed, pretended, or proper source; counterfeit.
judicious β using or showing judgment as to action or practical expediency; discreet, prudent, or politic: judicious use of one's money.
smart β having or showing quick intelligence or ready mental capability: a smart student.
apt β An apt remark, description, or choice is especially suitable.
cagey β If you say that someone is being cagey about something, you mean that you think they are deliberately not giving you much information or expressing an opinion about it.
canny β A canny person is clever and able to think quickly. You can also describe a person's behaviour as canny.
clear-sighted β If you describe someone as clear-sighted, you admire them because they are able to understand situations well and to make sensible judgments and decisions about them.
clever β Someone who is clever is intelligent and able to understand things easily or plan things well.
cool β Something that is cool has a temperature which is low but not very low.
discerning β showing good or outstanding judgment and understanding: a discerning critic of French poetry.
discriminating β to make or constitute a distinction in or between; differentiate: a mark that discriminates the original from the copy.
far-sighted β seeing objects at a distance more clearly than those near at hand; hyperopic.
sapient β having or showing great wisdom or sound judgment.
savvy β experienced, knowledgable, and well-informed; shrewd (often used in combination): consumers who are savvy about prices; a tech-savvy entrepreneur.
sensible β having, using, or showing good sense or sound judgment: a sensible young woman.
sharp β having a thin cutting edge or a fine point; well-adapted for cutting or piercing: a sharp knife.
shrewd β astute or sharp in practical matters: a shrewd politician.
smooth β free from projections or unevenness of surface; not rough: smooth wood; a smooth road.
wise β having the power of discerning and judging properly as to what is true or right; possessing discernment, judgment, or discretion.