Its a brazilian slang used by guys when they just broke up and are single or when they´re having a lot of fun being single. Or it can be used when a guy is down for everything. You can use "o pai tá on" to flirt too.

Neymar used this phrase to celebrate the classification of Paris Saint-Germain (PSG) for the Champions League semifinals.
neymar: chama no zap, o pai tá on ( slide my dms, o pai tá on)
by brazilll October 19, 2020
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