Green’s Dictionary of Slang

probs adv.

probably.

2007		Urban Dict. 🌐.
2012		C. Eble UNC-CH Campus Sl. 2011.
2016		C. Eble (ed.) UNC-CH Campus Sl. Spring 2016.
2020		C. von Ziegesar Cobble Hill 296: [quoting a text message] He probs went home by himself.