There is no 8-letter anagram. The letters do spell the term "brash guy."
The longest words made would be burghs, sugary, brush, scrub, shrub, grabs, Rugby, and bushy.
Some words you can spell with the letters m, y, b, r, l, g, h, and t are rhythm, myth, gym, by, my, and others.
brash
dedede
hi,has,ba,abi
BEARISH
wogo
"GATHER"
Nothing in English, there are no vowels.
behave have bee
bough
bit, abit, at, hat, bat, it, hi,
Lots!gorhenheroinoriganreaginregainregionargongirongraingroangroinheronhoganorganreignaeonaginagonairnearngaengaingiengirngrangrinhaenhernhornironrainreinroanaineonerngangenginhenhinhonionranrinaneninon