What word or phrase does your mother always say?
1560s, probably an alteration of stridlen, frequentative of striden (see stride). U.S. colloquial sense of "take up an equivocal position, appear to favor both sides" is attested from 1838. Related: Straddled; straddling. The noun is first recorded 1610s.
A powerful hallucinogen: a strictly contemporary folk drug, called STP by its Haight-Ashbury discoverers
[1960s+ Narcotics; fr Serenity Tranquility Peace, named in imitation of the oil additive STP2]