HO

ho
less honorific form of po, a marker of respect

Compare the following Tagalog sentences, which mean "Thank you." 

1. Salamat.

2. Salamat ho.

3. Salamat po. 

Use #1 with people your age, #3 with the elderly, and #2 ( ~ ho) with old people you are comfortable with. 

Ano ho?
What? (respectfully asking)

Baka ho.
Maybe.

Oho.
Yes.