mouhguh hahzeev eer dzahguh gahtznee, ahvehl muh gahbadz vohruh pohrtz guhneh muhdnehl

Even though the mouse can barely enter its hole (in the wall), it has tied a broom to its ass and is trying to get in.

Some people are so greedy and foolish that they try to acquire much more than they can possibly use.
The above saying is used to designate such people.