You really cut the turnip

To mess things up royally; originally used by 19th century farmers to mean "an embarrassing mistake during a harvest"

"You've booked the table for the wrong day, you really cut the turnip on this one"

tickled the turnip

Female masturbation.

'Jane was bored and so pulled up 50 shades of grey and tickled the turnip."

Electric Turnip

Euphemism for a 'personal massager' or vibrator. So named for its shape.

Not having found Mister Right at the bar, she returned home and took up her electric turnip.

timmy turnip

When you give a mans bellend a twist clockwise

My dad gave me a Timmy turnip

to slip the turnip

when one’s conscious abilities are altered into delirium due to oodles (a great quantity) of alcoholic beverages.

to slip the turnip ex. “God! Zoe really slipped the turnip when she started throwing cuscus out the apartment window in Morocco.”

Hairless turnip

Meaning scrotum or referring to a male genitalia; balls; shaved testicles

You ain’t nothing but a hairless turnip

Hairless turnip

Another word for scrotum; balls; testicles that’s shaved

You ain’t nothing but a hairless turnip.