Ф34

НА ФУФУobsoles,highly collPrepPInvaradv

(to dosth.) haphazardly, without proper care, thought, attentionetc

carelessly

slapdashin a slipshod (slapdash) manner.

Ему ничего важного нельзя поручать: все делает на фуфу. You can't trust anything important to him, he does everything slapdash.