The shorter and condensed version of expressing how you "like, love and want some more of" something. It references the song performed by Tim McGraw called "I Like It, I Love It", in which he repeats the phrase in each chorus, "I like it, i love it, i want some more of it".
1.) "Dude did you like the new episode last night?"
"Dude... I totally McGraw'd it man!"
2.) "Mmm! This casserole is amazing! I McGraw this feast so much!"
3.) "I'm not just in love with my girlfriend, I McGraw her."