all over oneself

Then the Frogs surrounded this Rabbit, an' they re-captured the skull, an' the Rabbits charged with ambition, an' the Frogs passed to the left, an' there was old Leapin' Frog himself, grinnin' all over himself with his club reached out a-puntin' the skull along like sixty-seven.

1939, Boys' Life - Jan 1939, page 25

Anyway, the network tells me Ishaka is all over himself over his new baby, kissing and cuddling her and calling her every endearing name I didn't even know existed.

2003, Mary Karooro Okurut, The Official Wife, →ISBN, page 81

Nowadays, UGA recruiters would be all over themselves to enroll three high-achieving African American students like Kerry Rushin Miller, Harold A. Black and Mary Blackwell Diallo.

2017 January 13, Lee Shearer, “UGA's first black freshmen — all three — recall what it was like”, in Athens Banner-Herald