a) too many tzedaka phone call
b) too many tzedaka letters
c) too many baalei tzedaka collecting in shuls
d) too many baalei tzedaka collecting at their houses
They derogatorily refer to these people who give them so many golden opportunities to get the mitzvah rabba of giving tzedaka and saving themselves from death and negative decrees as “schnorers”.
See what R’ Elazar says at the top of Kesubos 68a.