Sentence:  For some other guys who′ve <WSD>sussed</WSD> me out, it′s taken them quite some time. A certain regular of mine comes through three or four times a night, but not every night....That said, this regular never <WSD>sussed</WSD> for a hell of a long time. 
Meaning of the word marked with <WSD> tags:  To discover, infer or figure out.