pantywaist

adj

1. (especially, informal, not-comparable)Weak, timid, effeminate, ineffectual.

   “His rough, burly father was mortified by the lad's pantywaist behavior.”

noun

1. (dated, informal)An undergarment composed, in part, of panties attached to a waistband.

   “Lace trimmed panty waists—50 cents.”

2. (derogatory, informal)An ineffectual, weak, or timid person, especially a boy or young man; a sissy.

   “Don't be misled by the British tendency to be soft-spoken and polite. The English language didn't spread across the oceans and over the mountains and jungles and swamps because these people were pantywaists.”

   “She stared at the metal bars hanging from the wood beams of the ceiling. Lined handcuffs dangled from the ends. The dungeon master would suspend his handcuffed victim from that horizontal bar. “Don’t be a pantywaist, baby. This is what you wanted.””