Crack-up and Tongue-in-cheek

Crack-up noun - A mental or nervous collapse.

Tongue-in-cheek and crack-up are semantically related. In some cases you can use "Tongue-in-cheek" instead an adjective phrase "Crack-up".

Tongue-in-cheek adjective - Cleverly amusing in tone.

Crack-up and tongue-in-cheek are semantically related. Sometimes you can use "Crack-up" instead an adjective phrase "Tongue-in-cheek".