Толковый словарь английского языка Oxford English Reference - suss

v. & n. (also sus) Brit. sl. --v.tr. (sussed, sussing) 1 suspect of a crime. 2 (usu. foll. by out) a investigate, inspect (go and suss out the restaurants). b work out; grasp, understand, realize (he had the market sussed). --n. 1 a suspect. 2 a suspicion; suspicious behaviour. Phrases and idioms on suss on suspicion (of having committed a crime). Etymology: abbr. of SUSPECT, SUSPICION