Rap battles can be an intense game. Two people spitting rhymes, each trying to outwit and outsmart the other, slapping their rival down with nought but words.

It takes a sharp mind and clever turn of phrase to compete in a compelling rap battle. None of that was shown on Twitter between Tesco Mobile and O2.

The two U.K. mobile phone operators (or at least the people running their Twitter accounts) battled through tweets and it was awful. The rote rhymes, forced attempts at marketing, and plain unfunny tweets made it a battle to forget.

It seems the idea came from another Twitter user.

Tesco Mobile quickly hopped in, throwing down the first salvo. 

O2 fired back, subtweeting Tesco and throwing shade.

That just stoked the flames as the two sides attempted to spit hot fire, only to cough up feeble puffs of smoke.

"We are head master"? Someone please teach Tesco the difference between first-person singular and first-person plural.

Note: Be More Dog is O2's current marketing campaign. We don't get it either.

Oh goodness, a pop culture reference that actually works within the context of the battle. Well played.

Look, we're all for corporate Twitter accounts having a bit of personality: they're incredibly boring otherwise. This was terrible. At least Tesco had a little self awareness about the whole thing.

And thank goodness for that.

By the way, Tesco Mobile is a reseller of O2, so that's why you didn't see any low blows.

Photo via Todesvogel89/YouTube