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1700, thieves' cant, "to act as a lookout, spy on," from Middle English tuten "to peep, peer," probably from a variant of Old English totian "to stick out, peep, peer," from Proto-Germanic *tut- "project" (cf. Dutch tuit "sprout, snout," Middle Dutch tute "nipple, pap," Middle Low German tute "horn, funnel," Old Norse tota "teat, toe of a shoe"). The sense developed to "look out for jobs, votes, etc., to try to get them" (1731), then "praise highly" (1920). Related: Touted; touting.
A person who aids and supports someone having a psychedelic drug experience or ''trip''; guru (1960s+ Narcotics)