gap out
v.— «Steve (my friend) rolled up the joint while I was on look-out, and doing a rather half assed job because I was gapping out all the time.» —“Fucking Cops” by Mike DeBiasio Usenet: alt.drugs.pot Oct. 13, 1999. (source: Double-Tongued Dictionary)
Further reading
Why is marijuana called pot ? Lexicographer David Maurer, an expert on underworld slang, once posited that pot is shortened from potiguaya, a term that, it turns out, isn’t Spanish. He later surmised that pot comes from potación de guaya...
Book recommendations and the art of apology. Martha and Grant share some good reads, including an opinionated romp through English grammar, a Spanish-language adventure novel, an account of 19th-century dictionary wars, and a gorgeously illustrated...