suss /sʌs/verb 3adjective 1noun 2forms 5phrases 1 verb3 •(UK, Australia) To discover, infer or figure out.Think we're standing for injustice / White gets two and black gets five years / Well it took me quite a while to suss this — 1993 •(UK, Australia) To study or size up, to check out (examine). •(UK, no longer used) To arrest for suspicious behaviour. adjective1 •(US, informal) Suspicious; suspect.‘Yes – OK, OK. Try not to struggle, Tracey. It just makes you look even more suss.’ — 2001 noun2 •(UK) Social nous.‘I′m surprised at you, Danny Weston! I thought you had a bit more suss than this. I never thought you were capable of something so ... silly.’ — 1995 •(UK) Suspicious behaviour; the act of loitering with intent. formssussed · sussing · susses · more suss · most suss Phrases with suss suss outTo come to understand (a person).