sub-bĭbo

bĭbi, 3, v. a.
I. to drink a little, to tipple (very rare), * Plaut. Truc. 4, 3, 58 (dub.; Speng. si urnas bibit): si paulum subbibisset, * Suet. Ner. 20.
Lewis & Short
A Latin Dictionary, 1879
An open-access project