the one who tired soon, the one who don't walk much

tender-mouthed (horse), unreliable

the inexperienced cannot do good work, a child is not an expert, said about a fledgling or novice

credulous, easily deceived or misled

on back, the latter

break the back

leave, depart, turn tail

be knocked out in a wrestling bout

raw, uncooked, unbaked, half-done

half-baked

half-ripe

deceive, betray

leave someone in a lurch, betray

cheer, applaud by slapping the back, encourage, praise

younger child, younger sister or brother

becoming disappointed at the non-attainment of something

back,back part (of anything), support, aid

stab in the back

take rest for a while

to ignore, to disregard, to pay no attention