cuck

Short definition from Wiktionary

Noun

1. 1
   A cuckold or cuckquean.
2. 2
   A weakling.
3. 3
   One who meekly and submissively acts against their own interests, or those of their own race, gender, class, religion, etc.

Verb

1. 1
   To cuckold or cuckquean, to be sexually unfaithful towards.
2. 2
   To turn into a cuckold or cuckquean, to cheat with the partner of (someone).
3. 3
   To weaken or emasculate, to render pathetic.
4. 4
   To fool and thus lower the status of, to exploit the trust or tolerance of (to one's own benefit and the other's disadvantage); to make into a cuck (one who acts against their own interests).
5. 5
   To punish (someone) by putting them in a cucking stool.