OMG.

Procter & Gamble has applied to trademark millennial-friendly internet acronyms including “LOL,” “WTF,” “FML” and “NBD” for use on soap and cleaning products.

The decidedly uncool consumer giant, whose brands include Crest toothpaste and Febreze, applied for the trademark in April for use on liquid soap, dishwashing detergents, hard surface cleaners and air fresheners.

The company refused to explain to The Post what it wants with the terms — which, respectively, stand for “Laughing out loud,” “What the f-ck?,” “F-ck my life” and “No big deal.”

But new board member Nelson Peltz has blasted the multinational for its aging brands and failure to capture the millennial market — noting in a report that a brand like Gillette is a dinosaur compared to hip upstarts like Harry’s and Dollar Shave Club that boast huge social media followings.

Earlier this year, P&G also applied to trademark the phrase “Got sag? Get swag,” which it used to advertise Downy detergent.

The ad was featured on the popular Reddit page “Fellow Kids,” which mocks dorky advertisers trying desperately to appeal to the youth market.