Keep on and Throw a fit

Keep on verb - Allow to remain in a place or position or maintain a property or feature.

Throw a fit and keep on are semantically related. In some cases you can use "Throw a fit" instead a verb "Keep on".

Throw a fit verb - Get very angry and fly into a rage.

Keep on and throw a fit are semantically related. Sometimes you can use "Keep on" instead a verb phrase "Throw a fit".