suss definitions Merriam Webster's transitive verb Etymology: by shortening & alteration ... 2 (usu. foll. by out) a investigate, inspect (go and suss out the restaurants). b work out; grasp, understand, realize (he ... suspect. 2 a suspicion; suspicious behaviour. Phrases and idioms: on suss on suspicion (of having committed a crime). Etymology: abbr. of ... SUSPICION Collin's Cobuild Dictionary (susses, sussing, sussed) If you suss a person or situation, you realize or work out what ... ve sussed the reason for it... The women began to suss that there was no reason why they should be impressed ... n, V that, get n V-ed, also V wh • Suss out means the same as suss. They're sussing ...