to have the guts - have the strength, the will power, bravery - the opposite of being chicken.
You're a man of courage, I tell ya.
It takes a brave man to climb that mountain. You won't see me up there.
You don't have the guts to ask that girl on a date do you?! You're chicken! bock bock bock, cluck cluck cluck cluck. You're just a little chicken aren't cha! (put your thumbs in your armpits and wave your elbows up and down)
You have a pretty strong stomach for that type of stuff.
takes grit and courage
screw up your courage
to force yourself to be brave and do something that makes you nervous.
I don't know whether this comes directly from Shakespeare, or whether Shakespeare just embellished it in Lady MacBeth's 'screw your courage to the sticking-place'.
This one's not in the UE list (or is hiding somewhere I haven't looked) - 'to have the courage of your convictions' is to believe in something strongly enough to say so in public; and if you believe in something enough to risk losing money over it you 'put your money where your mouth is'. That is in the list.
If you believe in something enough not only to talk about it but also to do something about it some Br English speakers use the - originally US, I think - you 'don't just talk the talk, you walk the walk'.
It'd be good if each of the idioms was tagged (with one or more tags - like 'safety', 'courage', 'hesitation'...), so that it would be possible to do interactive searches on the basis of a word-cloud of themes.