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подливать масло в огонь stresses
gen.	add fuel to the fire; add fuel to the flames; fuel the debate (споров, и т.п. bigmaxus)
fig.	imbitter
fig.of.sp.	pour fuel on the fire (Халеев)
idiom.	throw gas on fire (on an already smoldering fire VLZ_58)
saying.	pour gasoline on a blaze (VampAle)
подливать масла в огонь
gen.	pour oil on flames; add oil to the flame; bring oil to the fire; throw oil on the on the fire; add fuel to the flame; fan the flames (Anglophile); pour oil on the flame; add fuel to the fire; precipitate a quarrel; pour more fuel on the fire (of 4uzhoj); nudge a process along (контекстуальный перевод Ремедиос_П)
Игорь Миг	add insult to injury; turn up the pressure; stir the pot; churn the waters
fig.of.sp.	pour fuel on the fire (Халеев); turn up the heat (Халеев)
idiom.	throw the fat in the fire (Yerkwantai); add more fuel to the fire (CNN Alex_Odeychuk); put oil on the fire (New York Times Alex_Odeychuk); throw fuel on the fire (you will learn how to quickly stop an escalating situation so you do not continue to throw fuel on the fire Sweeterbit)
Makarov.	pour oil on the fire; pour oil on the flames; throw oil on the fire; throw oil on the flames; add oil to the fire; add to oil to the fire; add to oil to the flame
product.	pour gasoline on (Yeldar Azanbayev)
proverb	add fuel to the flames (Olga Okuneva)
подливая масла в огонь
Игорь Миг	adding injury to insult

подливать масло в огонь: 2 phrases in 2 subjects

Idiomatic	1
Proverb	1