To masturbate.
pleasure oneself
touch up
To make slight corrections or adjustments to; to fill in or perfect.
touch base
To meet or make contact with someone, usually to consult, review, visi…
touch wood
Hopefully; said while touching something wooden, to avert superstitiou…
touch off
To start (something); to set off traps; especially used for unstable s…
touch a nerve
To make a remark or perform a deed which produces a strong response, e…