knock around

by a head

a bed of nails

have resistance to

shake a leg

at the drop of a hat

a blessing in disguise

a whale of a

a clean slate

in one's element

place in the sun

par for the course

go down in flames

go ape

a whale of a

a cut above

a double-edged sword

boot out

put one's money where one's mouth is

old hand

ivory tower

short out

a drop in the bucket

out of turn

spill one's guts

close the books

a feeding frenzy

sing the praises of

make hay

a heart of gold

every which way

pull apart

bear up

a household word

fall on one's face

bring up the rear

rant and rave

sit still for

in round numbers

a little bird