String (one) up slang
To hang someone with rope around one's neck in order to kill them
The soldiers strung him up on the behest of the commander.
The king would string up those whoever doesn't comply with his command.
The verb "string" must be conjugated according to its tense.
This is a phrasal verb based on figurative use of the word "string".
People tend to like forbidden or illegal things just because they are forbidden or illegal.
He must have believed that stolen fruit is the sweetest, and he, therefore, cheated on his partner.