ほったらかす

to neglect; to leave alone

Word type: 

Standard: 

ほうっておく

Standard kanji: 

放っておく

Example: 

仕事ほったらかして、どこ行っとってん!
Where were you when you took off from work?

あの夫婦、子どもほったらかしてパチンコばっかりしてるらしいで。
See that couple over there? They leave their kid alone and play pachinko all the time.