heittää löylyä kiukaalle

Etymology
A reference to being in a sauna. Throwing water on the sauna stove causes it to boil, which increases the humidity and thus the apparent room temperature.

Verb
(literally: "to throw water on the sauna stove")


 * 1)  to add fuel to the fire worsen a conflict
 * 1)  to add fuel to the fire worsen a conflict

Conjugation
See.